package com.algernoon.nettydemo.netty2.client;

import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.DelimiterBasedFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;

public class EchoClient {

	public void connect(String host, int port) throws Exception {
		// 配置客户端NIO线程组
		EventLoopGroup group = new NioEventLoopGroup();
		try {
			Bootstrap b = new Bootstrap();
			b.group(group)
			.channel(NioSocketChannel.class)
			.option(ChannelOption.TCP_NODELAY, Boolean.TRUE)
			.handler(new ChannelInitializer<SocketChannel>() {

				@Override
				protected void initChannel(SocketChannel ch) throws Exception {
					ByteBuf delimiter = Unpooled.copiedBuffer("$_".getBytes());
					ch.pipeline().addLast(new DelimiterBasedFrameDecoder(1024, delimiter));
					ch.pipeline().addLast(new StringDecoder());
					ch.pipeline().addLast(new EchoClientHandler());
				}
			});
			
			ChannelFuture f = b.connect(host, port).sync();
			
			f.channel().closeFuture().sync();
		} finally {
			group.shutdownGracefully();
		}
	}
	
	public static void main(String[] args) throws Exception {
		new EchoClient().connect("127.0.0.1", 8080);
	}
}
